Roller grinding-mill



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ROLLER GRINDING MILL.

No. 310.236. Patented Jan. 6, 1885.

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(No Model.) f 4 Sheets-Sheet 3.

W. H. WAKEFORD.'

ROLLER GRINDING MILL.

No. 310,236. Patented Jan. 6, 1885.

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UNITED STATES PATENT OFFICE.

VlLLIAM H. VAKEFORD, OF BALTIMORE, MARYLAND.

ROLLER GRINDING-IVIILL.

SPECIFICATION forming part of Letters Patent 1510.310236, dated January6, 1885.

Application led January 15, 19E-l.

Z0 uit whom, t 'nt/ty concern.-

Be it known that I. Wn. H. WAKEFORD, a citizen of the United States,residing at Baltimore, in the county of Baltimore and State of Maryland,have invented certain new and useful Improvements in RollerGrindingflvlills;

' and I do hereby declare the following to be a full', clear, and exactdescription of the invention, such as will enable others skilled in theart to which it ap pertains to make and use the same.

This invention relates to a roller-mill composed of two correspondinglines of two or more rollers each, the respective rollers ot' each linebeing connected and driven one from the other by universaljointcouplings, so that each roller is independent of every other roller sofar as removal or adjustment is concerned.

My improvement consists of certain novel combinations for adjusting andspreading the adjustable rollers, which combinations are specificallypointed out in the claims at the close of the specification.

In order that my invention may be clearly understood, I have illustratedin the annexed drawings and will proceed to describe a practicable formthereoi".

Figure l is a plan View o1' a roller-n1ill con-A taining four parallellines of rollers and constituting a duplex roller-mill embodying myinvention. Fig. 2 is an end view of said duplex roller-mill. Fig. 3 is aside view of the same. Figs. et to ll. illustrate details of theroller-mill.

The same letters of reference indicate identical parts in all thefigures.

The essential parts being simply duplicated` it is only necessary, to ai ull understanding of the construction of the duplex roller-mill, todescribe in detail one half or one side thereof, constituting a singleroller-mill of my construction, and the ensuing description will be,

confined to that way.

As usual, each pair ol' rollers consists oi' a non-adjustablc/roller andan adjustable roller. I have shown a line of three non-adjustablerollers` marked A, B, and C, respectively, and a corresponding line ofthree adjustable rollers, marked A', B', and Cf, respectively. Therollers are made of increasing length, the rollj ustable rollers.

(Xo model.)

together by a suitable coupling capable of' transmitting the motion ofone to the next.

I prefer to use a universal-joint coupling for connecting the journalsofthe nonadjustable rollers, the same as I use for connectingthejournals ofthe adjustable rollers, one forni of which will bepresently described in connection with the description of the mode o1'arranging and coupling the adjustable rollers.

The use of universal-joint couplings for eonneeting the non-adjustablerollers is preferable to the use of an ordinary coupling, because itadmits of slight divergences from perfect alignment of the rollers. Theline ot' these non` adjustable rollers is driven by a pulley, E, keyedor secured to the journal ot` roller C. Each adjustable roller isjournaled in a pair i ot' boxes seated, respectively, in dovetailed waysofa pair ofl'red-plates, F. (Shown in detail in Fig. 7. )vStif'fspiralsprings Gareinterposcd between the boxes of thenon-adjustable rollers and the boxes oi' the adjustable rollers,

tending to push the boxes oi' the adjust-able rollers away from theboxes of the non-ad At the other side, each box of each adjustableroller is connected by toggle-joint H to a knee, I, which is constructedwith a foot fitting in a dovetailed groove or way on the top ba-r of themain frame. The knee I is swivelingly connected to one end of a screw,l, which turns in a nut, l2, rigidljY secured to or formed on the mainframe. The toggle-joint II is always held straight between theadjustable boxes and the knee l', ex-

cept at times when the rollers are separated, so that by turning thescrew I' and thus moring t-he knee I the adjustable box may be slid onits bed-plate for the purpose ot' properly adj ust-ing the adjustableroller with reference tally-projecting armsk as there are adjust-ableboxes and toggle-joints, each arm 7e being connected by a link, K', withthe pivot-pin which connects the two bars of the toggle-joint. Therock-shaft K is provided with a suitable handlever, K2, adapted to belocked to a fixed rack, k'. By rocking shaft K in one direction thetoggle-joints may be collapsed to the required extent, so as to allowthe adjustable boxes and rollers to recede from the non-adj ustableboxes and rollers under the spreading action of the spiral springs G;and by rocking said shaft in the other direction and returning thetoggle-joints to their condition of straightness all the adjustablerollers can be returned to the same position which they occupied beforespreading.

In order that the adjustable rollers may be leveled, I provide thebed-plates F of their boxes with downwardly-projeeting tongues F',snugly fitting in holes in the cross-bars of the main frame, and apply agib and key, f2, through a hole, j', of tongue F' beneath the saidcross-bars for the purpose of vertically adjusting said bed-plates.After proper adjustment of the bed-plates F they are securely bolted totheir supporting cross-bars of the main frame. Each adjustable rollercan, by the means described, be separately adjusted with reference toits fellow non-adjustable roller. Like the line of non-adj ustablerollers, the line of adjustable rollers is driven by a single pulley, L,secured to one of the journals of the roller A', and in order that theremaining rollers B' and C may be properly driven from the roller A',whatever the adjustments ofthe respective rollers, I connect theadjacent journals ofrsaid rollers by universali-jointYdriving-couplings.

'Ihe coupling illustrated consists of a pair of iianged sleeves, l\I M',secured to therollerjournals, and a series of bars, m, constructed witha ball at each end, as shown in Fig. 4, for connecting the sleeves, theball ends ot' said bars being connected to the respective sleeves by twoseries of segmental caps, m', bolted to the ianges ofthe sleeves.Suitable sockets are formed partly in the sleeves and partly in the capsfor the reception ot' the balls of the bars m, such sockets and theholes in the caps being made sufficiently large to admit of such play ofthe bars m as is required to permit of the independent adjustment of therollers. To the same end the adjacent surfaces of the caps are maderounding.

Itis obvious that any known slip-joint universal driving-coupling may beused in place of the coupling described.

In the duplex mill illustrated I have shown the rock-shafts used forspreading the rollers of the two lines of breaks as connected by a link,so that the rollers of the two lines of breaks may be simultaneouslyspread. rIhe adjustable rolls of one series of breaks and thenonadjustable rolls of the other series -of breaks may be driven by asingle belt running from a driving-pulley, as shown in Fig. 2. The beltN (shown in dotted lines in Fig. 2) extends from driving-pulley L2 overpulley L, secured to the journal of one of the adjustable rolls ot' theiirst series of breaks around an idler, L', thence over a pulley securedto the journal of one ofthe non-adjustable rolls of the other series ofbreaks, and thence back to driver L2, while the belt O (shown in fulllines) extends from a pulley secured to the opposite end of thedriving-shaft, over a pulley, O', secured to the journal of one of theadjustable rolls ofthe second series of breaks, around an idler, O2;thence over a pulley, E, secured to the journal of one of thenonadjustable rolls of the first series of breaks; thence back to thedriver, the belt being crossed; but it is obvious that all the rollersof one series of breaks may be driven independently of the rollers ofthe other series of breaks of such a duplex roller-mill.- gearing may beused instead of belt-gearing for driving the rolls.

This roller-mill is to be provided with suitable hopper-s andfeed-regulating devices; also with suitable means for separating themeal after each break; also with suitable means for transferring thetailings from the separator of one break to the hopper of the nextbreak. All these means may be of well-known construction and applied in-the usual Way. Vhat I claim as my invention isl. Thecombination,.substantially as beforeA set forth, oi'l an adjustable box,an Yadjustable knee, and a toggle-joint for connecting said box to saidknee.

2. rIhe combination, substantially as before set forth, of an adjustablebox, an adjustable knee, a togglejoint for connecting said box to saidknee, and a screw for holding and adjusting the knee.

The combination, substantially as before set forth, of the adjustableboxes of an adjustable roller, an adjustable knee for each box,togglejoints for connecting the boxes to the knees, a rock-shaftprovided with arms, and links for connecting the arms of the rock-shaftswith the toggle-joints.

In testimony Wh ereof I affix my signature in presence of two witnesses.

VILLIAM H. XVAKEFORD.

W' itnesses:

F. UEBEL, E. A. HEINZ.

Cog,

IOO

